Трансформатор LUNDAHL LL1677. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
                        S-761 50 NORRTALJE         Phone    +46 - 176 13930   0176-13930

	                SWEDEN                     Fax      +46 - 176 13935   0176-13935
High Current Tube Amplifier Interstage Transformer
LL1677
LL1677 is a high current interstage transformer with a 1:2 step up ratio.
The transformer is wound with a special low capacitance winding technique to achieve best high frequency
performance. The transformer has a special high flux, low distortion audio C-core of our own production.
For the LL1677, the core air gap is chosen such that the denoted DC current (80mA for a LL1677/80mA)
generates a no signal core flux density of 1.2 Tesla when used with all primaries in series. This leaves a flux
density swing of  0.4 T for the signal.
Winding schematics, physical dimensions, pin and mounting hole layout (all dimensions in mm)
36
2
A
5                13
10   9   8   7   5   4   3   2         C
3                16
4 x M3
B
Mounting holes
56                                                                4
73
Bottom view                                                9
B
21     18   16    13                       21
8
C
10                18
A
53                                  61
7
Weight         Turns ratio      Static resistance,     Static resistance,     Static resistance,
Winding A           winding B          winding C
0.75 Kg      1+1+1+1 : 4 + 4          88 W               69 W              800  W
Max. current through any single primary section:                       100 mA
Isolation between primary and secondary windings / between windings and core:  4 kV / 2 kV
Type                            LL1677/80mA                 V+
Connection                          Alt A
SE to SE Interst.
2              13
1 : 2
3
Primary DC current for             80 mA
4                       To grid
1.2 Tesla
5              16
Primary Inductance                  24 H
7              18
Suggested termination for best   22k in series with
8
freq. response                      330 pF
9
Freq. Response (+/-1dB) @       23Hz - 34 kHz
10              21
source impedance (*)                1 kW
Secondary  terminated as above                                    Alt. A
Max output                       145 V r.m.s.                       1 : 2
voltage @ 30 Hz                (410V peak-peak)        Single End to Single End Interstage
R020128